CN105833974A - Cement production system based on opened and closed circuit joint control and process of cement production system - Google Patents
Cement production system based on opened and closed circuit joint control and process of cement production system Download PDFInfo
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- CN105833974A CN105833974A CN201610275440.7A CN201610275440A CN105833974A CN 105833974 A CN105833974 A CN 105833974A CN 201610275440 A CN201610275440 A CN 201610275440A CN 105833974 A CN105833974 A CN 105833974A
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- cement
- opening
- ball mill
- closing
- production system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a cement production system based on opened and closed circuit joint control. The cement production system comprises a ball mill used for milling cement clinkers sintered into blocks into powder; the ball mill is connected with a motor-driven baffle and a powder concentrator used for sorting powdery cement, and the motor-driven baffle is connected with a flowmeter; and a discharging opening of the powder concentrator is connected with a feeding opening of the ball mill and a discharging opening of the flowmeter. The process of the cement production system includes the steps that the cement clinkers sintered into the blocks are extruded into cement semi-finished products; the obtained cement semi-finished products are ground into powdery cement semi-finished products; the powdery cement semi-finished products are output through two ways and are divided into first cement and second cement, and cement fine materials are screened out from the first cement; and the cement fine materials and the second cement are mixed according to a set proportion, and cement finished products are obtained. The size distribution of the cement finished products prepared through the process is widened, the water needing amount is reduced, the adaptability is better, and the higher working performance is achieved; and during cement grinding and production, excessive powder grinding is avoided, and consumption of the electric quantity is reduced.
Description
Technical field
The present invention relates to a kind of manufacture of cement neighborhood, be specifically related to a kind of cement production system based on the road combined control of opening and closing and technique thereof.
Background technology
At present, manufacture of cement has closed circuit grinding and two kinds of techniques of open circuit grinding；Wherein, the closed circuit cement produced that grinds had the advantage that grinding phenomenon is few and power consumption is low, but also had the finished cement distribution of particles produced to concentrate simultaneously, the inferior position that water requirement is high；It is low that the finished cement of open circuit grinding has water requirement, the advantage having good workability, but the most also have mill simultaneously in, temperature is high, easily grinding phenomenon and the high inferior position of power consumption occurred；Therefore, how open circuit and closed circuit grinding being combined the respective advantage of performance, also can obtain suitable cement granularity distribution simultaneously, the service behaviour improving cement is the emphasis that people are studied.
Summary of the invention
For above-mentioned deficiency of the prior art, cement production system based on the road combined control of opening and closing that the present invention provides and technique thereof, ensureing preferably while cement specific surface area, be provided that again suitable cement granularity distribution, make cement and admixture more adapt to, improve the service behaviour of cement.
In order to reach foregoing invention purpose, the technical solution used in the present invention is: provide a kind of cement production system based on the road combined control of opening and closing, and it includes the ball mill for the clinker of sintering in bulk is milled into powdery；Ball mill is connected to an electric guard board and for sorting the powder concentrator of powdered cement, and electric guard board is connected with effusion meter；The discharging opening of powder concentrator is connected with the feeding mouth of ball mill and the discharging opening of effusion meter respectively.
Further, a screening machine it is provided with between ball mill and electric guard board and powder concentrator.
Further, ball mill connects has one for extruding the roll squeezer of the clinker of sintering in bulk.
Further, flow is calculated as Shen gram impact flow meter.
Further relating to a kind of cement production process based on the road combined control of opening and closing, its technical scheme used comprises the steps:
A, by sintering in bulk clinker be squeezed into cement semi-finished product；
B, the cement semi-finished product obtained is ground to form powdery cement semi-finished product；
C, powdered cement semi-finished product are divided into two-way output, respectively cement one and cement two, from cement one, filter out cement fines；
D, cement fines and cement two are mixed in setting ratio, obtain finished cement.
Further, utilizing screening machine to sieve powdered cement semi-finished product, screening out specific surface area is 250m2/kg, and fineness index is the cement two that 45um tails over 30%；Utilizing powder concentrator that cement remaining in screening machine one is selected powder, filtering out specific surface area is 380m2/kg, and fineness index is the cement fines that 45um tails over 5%.
Further, deliver to cement two to have in valve position electric guard board, and use effusion meter to measure the flow of cement two in real time.
Further, cement fines and cement No. two numbers is mixed in the setting ratio of 78%:22% ~ 82%:18%.
Further, cement fines and cement No. two numbers is mixed in the setting ratio of 80% ~ 20%.
Further, screening cement one with powder concentrator, filtering out specific surface area is 100m2/kg, and fineness index is the cement coarse fodder that 45um tails over 70%, and is passed in ball mill.
The invention have the benefit that this cement production system based on the road combined control of opening and closing and technique thereof, increasing in former closed circuit path basis has the electric guard board of valve position, effusion meter, and center controllers can control electric guard board aperture according to flow indication；
In production, ball mill specific surface area out is 250m2/kg, fineness index is that 45um tails over the cement two of 30% and directly enters finished product without powder concentrator, cement specific surface area is on the low side, but it is provided that the distribution of particles improving cement, and through powder concentrator specific surface area 380m2/kg out, fineness index is that 45um tails over the cement fines of 5% and mixes in the ratio of 80%:20% with cement two, mixed finished cement is made to reach specific surface area 360m2/kg, fineness index is that 45um tails over 8%, after mixing, the particle size distribution of finished cement is widened, improve the workability of finished cement, reduce the water requirement of finished cement.
Accompanying drawing explanation
Fig. 1 is the road combined control flow of cement opening and closing and the schematic flow sheet of technique thereof.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only an embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into protection scope of the present invention.
As it is shown in figure 1, the ball mill for the clinker of sintering in bulk being milled into powdery should be included cement production system based on the road combined control of opening and closing；Discharging opening at ball mill is connected to an electric guard board and for sorting the powder concentrator of powdered cement, and the discharging opening of powder concentrator is connected with the feeding mouth of ball mill and the discharging opening of effusion meter respectively, and preferably flow is calculated as Shen gram impact flow meter.
Wherein, a screening machine it is provided with between ball mill and electric guard board and powder concentrator, to from ball mill out after powdered cement carry out primary screening, filtering out specific surface area is 250m2/kg, fineness index is that 45um tails over the cement two of 30% and is sent directly into finished cement, and remaining powdered cement is sent in powder concentrator and again screened.
The cement fines filtered out through powder concentrator mixes with the cement flowed out from electric guard board, obtains finished cement, and the cement coarse powder filtered out through powder concentrator passes back into mill and again carries out grinding；In production, the closed circuit clinker of sintering in bulk that is ground to, after ball mill is levigate, enters powder concentrator sorting, and cement coarse powder passes back into the operation grinding row grinding again；Open circuit grinding is the operation once no longer refluxed by ball mill.
In being embodied as, should cement production system based on the road combined control of opening and closing be combined by the open circuit of cement with closed circuit grinding；Compared with open circuit grinding, the road combined control of this opening and closing is ground and is filtered out cement fines and cement coarse fodder by powder concentrator, cement coarse fodder is delivered to ball mill proceed to grind, and cement fines is sent directly into finished product, avoid the operation once no longer refluxed in open circuit grinding by ball mill, easily occur that fines grinds repeatedly, produced grinding phenomenon.
Compared with closed circuit grinding, people can be by the mixed proportion of the regulation cement fines through powder concentrator screening with the cement two flowed out from electric guard board, adjust tailing over of finished cement, do not affecting the original yield of ball mill, on the basis of not increasing power consumption, can be according to consumer market demand, it is provided that the cement of various granularities, effectively improve cement work；And if closed circuit grinding need to control to tail over, improving cement work, then need air quantity to be greatly reduced, controls powder concentrator rotating speed, thus cause yield to reduce, power consumption increases, and improves production cost.
The ball mill of cement production system based on the road combined control of opening and closing should connect and have a roll squeezer, for extruding the clinker of sintering in bulk, and the pat of cement after pressurization is delivered to ball mill is ground；In being embodied as, the little granule internal structure of clinker is full of many fine cracks because being squeezed, and improves the grindability of clinker, makes Ball Mill System output increased 30 ~ 50%.
According to the cement production process of cement production system based on the road combined control of opening and closing, its technical scheme used comprises the steps:
A, by sintering in bulk clinker be squeezed into cement semi-finished product；That is: the clinker of sintering in bulk is sent into roll squeezer to extrude；By roll squeezer, clinker is extruded, make the little granule internal structure of clinker be full of many fine cracks because being squeezed, improve the grindability of clinker, improve grinding efficiency.
B, the cement semi-finished product obtained is ground to form powdery cement semi-finished product；Cement semi-finished product after extruding is sent into ball mill be ground.
C, powdered cement semi-finished product are divided into two-way output, respectively cement one and cement two, from cement one, filter out cement fines；
In being embodied as, utilize screening machine that powdered cement semi-finished product are sieved, screening out specific surface area is 250m2/kg, fineness index is the cement two that 45um tails over 30%, deliver to cement two to have in valve position electric guard board, and controlled the flow of flow through cement two by electric guard board.
Utilizing powder concentrator that cement remaining in screening machine one is selected powder, filter out specific surface area 380m2/kg, fineness index is the cement fines that 45um tails over 5%, and itself and cement No. two numbers is mixed, to widen the particle size distribution of cement.
When utilizing powder concentrator that cement one is selected powder, filtering out specific surface area is 100m2/kg, and fineness index is the cement coarse fodder that 45um tails over 70%, and is passed to ball mill and re-starts grinding；
In the grinding of ball mill, decreasing specific surface area is 250m2/kg, fineness index is that 45um tails over 30% and specific surface area 380m2/kg, and fineness index is the grinding that 45um tails over the cement of 5%, and adding specific surface area is 100m2/kg, fineness index is the grinding that 45um tails over the cement of 70%, reduce the water requirement in process of lapping, make water requirement at 25-26%, simultaneously, avoided grinding phenomenon, and used mill cement temperatures and maintain 70-80 DEG C.
D, cement fines and cement two are mixed in setting ratio, obtain finished cement；
In being embodied as, effusion meter is used to measure the flow of cement two in real time, coordinate the aperture of regulation electric guard board, and preferably flow is calculated as measuring free-pouring scattered section flow, and shot thing is carried out the Shen gram impact flow meter of Automatic continuous dosing, metering, dispensing.
In production, being 250m2/kg from ball mill specific surface area out, fineness index is that 45um tails over the cement two of 30% and directly enters finished product without powder concentrator, and its cement specific surface area is on the low side, but is provided that preferable concrete scroll；By cement two and specific surface area 380m2/kg, fineness index is that 45um tails over the cement fines of 5% and mixes mutually, makes the specific surface area of the two neutralize mutually with fineness index；
In being embodied as, tailing over of finished cement can be adjusted by the mixed proportion of regulation cement fines with cement two, do not affecting the original yield of ball mill, on the basis of not increasing power consumption, according to consumer market demand, the cement of various granularity is provided, effectively improves cement work；And if closed circuit grinding need to control to tail over, improving cement work, then need air quantity to be greatly reduced, controls powder concentrator rotating speed, thus cause yield to reduce, power consumption increases, and improves production cost.
The preferred embodiments of the present invention are: observe the flow of the cement two that described effusion meter is measured, and regulate the aperture of electric guard board, make cement fines and cement No. two numbers mix in the setting ratio of 78%:22%, obtain finished cement；Mixed finished cement reaches specific surface area 358m2/kg, fineness index is that 45um tails over 8%, the particle size distribution of finished cement is widened, the capillary radius of finished cement is 40nm, though not causing bigger capillary tension, improve the workability of concrete, but in process of production, 1.28 times by the output increased of finished cement.
The preferred embodiments of the present invention are: observe the flow of the cement two that described effusion meter is measured, and regulate the aperture of electric guard board, make cement fines and cement No. two numbers mix in the setting ratio of 82%:18%, obtain finished cement；Mixed finished cement reaches specific surface area 362m2/kg, fineness index is that 45um tails over 8%, after mixing, it is 45nm that the particle size distribution of finished cement widens the capillary radius of finished cement, cause the capillary tension matched with capillary radius, improve the workability of finished cement, reduce the water requirement of finished cement；And in process of production, 1.21 times by the output increased of finished cement.
The preferred embodiments of the present invention are: observe the flow of the cement two that described effusion meter is measured, and regulate the aperture of electric guard board, make cement fines and cement No. two numbers mix in the setting ratio of 80%:20%, obtain finished cement；Mixed finished cement reaches specific surface area 360m2/kg, and fineness index is that 45um tails over 8%, and after mixing, the particle size distribution of finished cement is widened, and improves the workability of finished cement, reduces the water requirement of finished cement.
Simultaneously, owing to the discrete particles of cement fines under unit volume being mingled with the cement two of 0.75 times, the capillary radius making finished cement is 44nm, both bigger capillary tension had been caused, make cement mixing concrete when and the better adaptability of additive, improve the workability of concrete, the most in process of production, 1.25 times by the output increased of finished cement.
The described above of disclosed embodiment, make professional and technical personnel in the field be capable of or use the present invention, multiple amendment to these embodiments will make obviously for those skilled in the art, generic principles defined herein can realize in the case of the spirit or scope without departing from invention in other embodiments.Therefore, the present invention will not be limited and the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and novel features.
Claims (10)
1. a cement production system based on the road combined control of opening and closing, it is characterised in that: include the ball mill for the clinker of sintering in bulk being milled into powdery；Described ball mill is connected to an electric guard board and for sorting the powder concentrator of powdered cement, and described electric guard board is connected with effusion meter；The discharging opening of described powder concentrator is connected with the feeding mouth of ball mill and the discharging opening of effusion meter respectively.
Cement production system based on the road combined control of opening and closing the most according to claim 1, it is characterised in that: it is provided with a screening machine between described ball mill and described electric guard board and powder concentrator.
Cement production system based on the road combined control of opening and closing the most according to claim 3, it is characterised in that: described ball mill connects has one for extruding the roll squeezer of the clinker of sintering in bulk.
Cement production system based on the road combined control of opening and closing the most according to claim 1, it is characterised in that: described flow is calculated as Shen gram impact flow meter.
5. the cement production process according to the arbitrary described cement production system based on the road combined control of opening and closing of claim 1 ~ 3, it is characterised in that: comprise the following steps:
A, by sintering in bulk clinker be squeezed into cement semi-finished product；
B, the cement semi-finished product obtained is ground to form powdery cement semi-finished product；
C, powdered cement semi-finished product are divided into two-way output, respectively cement one and cement two, from cement one, filter out cement fines；
D, cement fines and cement two are mixed in setting ratio, obtain finished cement.
Cement production process based on the road combined control of opening and closing the most according to claim 5, it is characterised in that: utilizing screening machine to sieve powdered cement semi-finished product, screening out specific surface area is 250m2/kg, and fineness index is the cement two that 45um tails over 30%；Utilizing powder concentrator that cement remaining in screening machine one is selected powder, filtering out specific surface area is 380m2/kg, and fineness index is the cement fines that 45um tails over 5%.
Cement production process based on the road combined control of opening and closing the most according to claim 6, it is characterised in that: deliver to cement two to have in valve position electric guard board, and use effusion meter to measure the flow of cement two in real time.
Cement production process based on the road combined control of opening and closing the most according to claim 7, it is characterised in that: cement fines and cement No. two numbers is mixed in the setting ratio of 78%:22% ~ 82%:18%.
9. according to the cement production process based on the road combined control of opening and closing described in claim 7 or 8, it is characterised in that: cement fines and cement No. two numbers is mixed in the setting ratio of 80% ~ 20%.
Cement production process based on the road combined control of opening and closing the most according to claim 5, it is characterized in that: with powder concentrator, cement one is screened, filtering out specific surface area is 100m2/kg, and fineness index is the cement coarse fodder that 45um tails over 70%, and is passed in ball mill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610275440.7A CN105833974A (en) | 2016-04-29 | 2016-04-29 | Cement production system based on opened and closed circuit joint control and process of cement production system |
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| CN201610275440.7A CN105833974A (en) | 2016-04-29 | 2016-04-29 | Cement production system based on opened and closed circuit joint control and process of cement production system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111032592A (en) * | 2017-08-08 | 2020-04-17 | 蒂森克虏伯工业解决方案股份公司 | Method and apparatus for producing cement |
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Application publication date: 20160810 |